Multiple choice general knowledge Which country has the world's longest rail tunnel? Japan China India Russia Reveal answer Fill a bubble to check yourself A Correct answer Explanation Japan's Seikan Tunnel (53.85 km) connects the islands of Honshu and Hokkaido. It was the world's longest rail tunnel from 1988 until 2016, when Switzerland's Gotthard Base Tunnel (57.1 km) surpassed it. Among the options given, Japan is correct.